Homelessness-not able to be consistently contacted; Dementia, Planned Movement from area; Unstable angina, Myocardial Infarction in past 3 months; Stroke; Two or more seizures in last 3 months; document alcoholism or drug abuse; Pregnant or planning to become pregnant in next 12 months; Severe immunodeficiency or cirrhosis of the liver; Type 1 diabetes; blind individuals; psychosis; pancreatitis with secondary diabetes; Renal disease.